We don’t have to follow IBNC for common names, just have to use them more often…
How many people have seen a dead man’s tongue? or dead woman for that matter. (Do you have a stash of dead bodies in your basement Debbie?)

Besides, if Cathy at Cornell is claiming that her walk participant coined the term in Oct. 2007, the Dead Man’s Tongue has precedence since, as evidenced by my post, it was being used prior to 2006! ;)